3560G and 2960 switch CPU loading

[Wilson Kwok]

Hi all,

I'm using PRTG monitoring switchs performance, the core switch 3560G CPU is 75% and outsite switch 2960 CPU is 25%, is it high loading of those switch ?

Thanks

[Wilson Kwok]

Sorry, it is memory not CPU.

[Leo Laohoo]

What IOS version are you running?

[Wilson Kwok]

Leo again !

Please see below information

Cisco IOS Software, C3560 Software (C3560-IPSERVICES-M), Version 12.2(35)SE5, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Thu 19-Jul-07 18:15 by nachen
Image text-base: 0x00003000, data-base: 0x01300000

ROM: Bootstrap program is C3560 boot loader
BOOTLDR: C3560 Boot Loader (C3560-HBOOT-M) Version 12.2(25r)SEE4, RELEASE SOFTWARE (fc1)

Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 12.2(44)SE6, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Mon 09-Mar-09 18:10 by gereddy
Image text-base: 0x00003000, data-base: 0x01100000

ROM: Bootstrap program is C2960 boot loader
BOOTLDR: C2960 Boot Loader (C2960-HBOOT-M) Version 12.2(44)SE6, RELEASE SOFTWARE (fc1)

Thanks

[Leo Laohoo]

Wilson,

Those IOS version you are running are ancient.  Did you ever considering upgrading to something more recent?

You could try either 15.0(2)SE4 for your 2960 and 12.2(55)SE8 for your 3560.

[Wilson Kwok]

Leo,

1. I want to know 75% and 25% memory too high or normal ? because I have use show processes memory to check those switchs still have free memory.

2. I'm new staff of this company, so still learning on the existing network.

3. If upgrade those version, will fix the performance issue ?

Thanks

[Leo Laohoo]

1. I want to know 75% and 25% memory too high or normal ? because I have use show processes memory to check those switchs still have free memory.

That's not normal level.

[Wilson Kwok]

Hi Leo

I have attached PRTG report and Cisco show proc memory command to you, thanks for help.

3560G

Processor Pool Total:   94334556 Used:   14594348 Free:   79740208

      I/O Pool Total:    8380416 Used:    3587708 Free:    4792708

Driver te Pool Total:    1048576 Used:         40 Free:    1048536

--------------------------------------------------------------------------

2960

Processor Pool Total:   34988900 Used:    8256776 Free:   26732124

      I/O Pool Total:    4186112 Used:    1641672 Free:    2544440

Driver te Pool Total:    1048576 Used:         40 Free:    1048536

[Leo Laohoo]

What are the uptimes of your switches?

[Wilson Kwok]

Around 9 months.

[Wilson Kwok]

Hi Leo,

Just confirmed the 3560G uptime is 1 month and the 2960 uptime is 10 month.

Is the 2960 uptime to long to caused the loading ? because this 2960 switch is in front of firewall. In office hour, I use ping to internet host, it has 500-600ms, even over 1,000ms.

Also this 2960 switch connecting other sites with IPLC etc, we have some heavy traffic (200mb/15mins) send to other side via IPLC, so it is holding heavy traffic with IPLC etc and internet.

Do you think I reset this switch will decrease the loading ?

Thanks

[Leo Laohoo]

Do you think I reset this switch will decrease the loading ?

Uptime has got nothing to do with high CPU.

The behaviour is most likely due to an on-going IOS bug with the version you are running.  Rebooting it will not fix anything.  The CPU will still spike as you give the switch more time.

[Wilson Kwok]

Hi Leo,

Do you mean upgrade both switchs IOS ?

[Leo Laohoo]

Do you mean upgrade both switchs IOS ?

Yes.  You have so many options.  Upgrade one, observe for 2 weeks.  If no problem, then you decide how to proceed.

[Wilson Kwok]

OK, I just checked there allow me to download lanbase and lanbase with web for 2960 and IP base and Service base for 3560G, Which IOS of 150-2.SE5 good for my existing swtich ?

Thanks